Why not only 1??

Why not only 1?? 23. Select the correct one w.r.t. Conjugation. (2) Hfr x F + (3) Hfrx (1) and (3) 4)

Dear student,
In case of option (3) in this question, when a Hfr transfers its genome to the F- strain, sometimes the conjugation gets disrupted and the entire genome may not be transferred and only a part of the genome gets transferred. So the resulting genome gets a part of F-  genome and remains F-. Hence both option (1) and (3) are correct.
Hence, option (4) is correct.

Regards.

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